DIN EN ISO 15971:2014-09
Natural gas - Measurement of properties - Calorific value and Wobbe index (ISO 15971:2008); German version EN ISO 15971:2014
| Fecha edición: |
2014-09-01
En Vigor
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| Idiomas disponibles: | Inglés, Alemán |
| Resumen: | This International Standard concerns the measurement of calorific value of natural gas and natural gas substitutes by non-separative methods, e.e. methods that do not involve the determination of the gas composition nor calculation from it. It describes the principles of operation of a variety of instruments in use for this purpose, and provides guidelines for the selection, evaluation, performance assessment, installation and operation of these. Calorific values can be expressed on a mass basis, a molar basis or, more commonly, a volume basis. The working range for superior calorific value of natural gas, on the volume basis, is usually between 30 MJ/m3 and 45 MJ/m3 at standard reference conditions (see ISO 13443). The corresponding range for the Wobbe index is usually between 40 MJ/m3 and 60 MJ/m3. This International Standard neither endorses nor disputes the claims of any commercial manufacturer for the performance of an instrument. Its central thesis is that fitness-for-purpose in any particular application (defined in terms of a set of specific operational requirements) can be assessed only by means of a well-designed programme of experimental tests. Guidelines are provided for the proper content of these tests. |
| Keywords: | Acceptance|Acceptance specification|Calibration|Calorific value|Calorific values|Calorimetric|Check lists|Combustion|Combustion gas|Definitions|Gases|Maintenance|Measurement|Measuring techniques|Natural gas|Operating conditions|Physical properties|Properties|Quality control|Specification (approval)|Wobbe index |
| ICS: | 75.060 - Gas natural |
| CTN: | |
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Equivalencia Internacional |
Idéntica EN ISO 15971:2014 Idéntica ISO 15971:2008 |
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Reemplazo Normas |
Reemplaza a DIN EN ISO 15971:2013-09 |
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